2099447771 has 2 divisors, whose sum is σ = 2099447772. Its totient is φ = 2099447770.

The previous prime is 2099447767. The next prime is 2099447773. The reversal of 2099447771 is 1777449902.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 2099447771 - 2² = 2099447767 is a prime.

Together with 2099447773, it forms a pair of twin primes.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (2099447773) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1049723885 + 1049723886.

It is an arithmetic number, because the mean of its divisors is an integer number (1049723886).

Almost surely, 2^2099447771 is an apocalyptic number.

2099447771 is a deficient number, since it is larger than the sum of its proper divisors (1).

2099447771 is an equidigital number, since it uses as much as digits as its factorization.

2099447771 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 889056, while the sum is 50.

The square root of 2099447771 is about 45819.7312410276. The cubic root of 2099447771 is about 1280.4669054719.

The spelling of 2099447771 in words is "two billion, ninety-nine million, four hundred forty-seven thousand, seven hundred seventy-one".